A control system of cultivation watering with a
regulator-controller LB-600

AN EXAMPLE
APPLICATION

functions: measurement, registry, regulation,
control

measurement: soil moisture, temperature, humidity
and other air parameters

competitive price

checked at work in the meteorological and plant
cultivation stations

APPLICATION

Watering control system is used for keeping a set moisture level in
soil at the cultivation fields of vegetables or other cultivations. The
controller can switch on the watering devices (pumps, watering section
values of the sprinkler heads etc.) adequately to a day time and a
measured moisture level in soil, and additionally in function i.e. air
temperature and humidity, precipitation and other meteorological
parameters. The control device is designed for assembly in the
protected rooms or in the open filed using the protective cases.

CONSTRUCTION

The system works autonomously based on a regulator LB-600. The
regulator has a possibility of communication with a computer. The
computer software (LBX program) allows on remote change in the control
parameter settings as well as the measurement registry. The controller
has a package structure, which allows on choosing a set of inputs and
outputs for the necessity of a planned watering system. The
possibilities of program configuration are very wide and allow on
creating many functions adjusting to individual needs of a certain
control option. The regulator’s detailed parameters can be found on the
web page concerning
LB-600.

Picture 1 The devices cooperating
with the regulator LB-600:

A, – the watering devices (sprinklers), B - the
electromagnetic valves cutting the water supply, C - a pump powering
the watering devices, D - a water tank, E - the soil moisture sensors,
F - a mast with the devices for climate measurement (wind,
rainfall, insolation, temperature, humidity and pressure), G – a
protective case for a regulator and an electric switchgear.

The following executive elements can be attached in example to the
regulators LB-600:

A valve opening water for the watering devices controlled open /
close or proportionally.

A valve regulating liquid fertilizer inflow to water in an open /
close way or proportionally.

The water pumps for the watering devices controlled in an open /
close way or proportionally.

The signaling devices.

Other servos and devices controlled in an open / close way or
proportionally.

ACTION

The output watering regulation signals are the results of the
balance calculations of a cultivation’s demand in water, based on a
value of a set demand and the actual measured values: soil moisture and
temperature, air humidity and temperature, precipitation and other
additional values. When generating the control signals, beside the
numerical calculations also the time dependencies are taken into
consideration, so the watering is performed in an optional time.

Because of a configuration’s elasticity it is possible to
realize the additional functions through a servo such as i.e. doping of
water which supplies the cultivations of the liquid fertilizers.

Picture 2 A block scheme of a watering control
system installation:

A - the soil moisture measurement sensors, B – an air
hytherograph, C - a precipitation meter, D - a wind force and direction
meter, E - a controller-regulator LB-600, F - an acoustic signaler, G -
a computer cooperating with the LBX program, H - the electro-magnetic
valves of water power supply, I- a water pump controlled fluently, J -
the water pumps controlled on/off, K - an inverter.

The controller
LB-600 is a package
device, which allows on choosing the configurations of the inputs and
outputs depending on the needs. The example displayed above of
the watering control system was introduced for the following
configuration of the inputs and outputs:

The set’s construction and control software’s work was evaluated
with consulting the experts and producers of the filed cultivations.
Because of the modern regulators’ construction there is a possibility
of multiple, independent program work entry to the regulators. The
regulators LB-600 can work in common installation with the other
regulators and recorders.

COOPERATING DEVICES

Valves, pumps

The regulator-controller can cooperate with any electro-magnetic
valves and the pumps using adequate transmitter blocks and contractors
as well as the valves controlled in a constant way (directly or by
using the inverters).

Other devices

The regulator-controller can cooperate with random executive devices
controlled on/off using the adequate transmitter blocks and contractors
or controlled in a proportional way (directly or by using the
inverters) analogue signals.

Detailed technical data and recommended work conditions can be found
on the soil moisture meter’s web site - ThetaProbe
ML2x, a hytherograph’s
LB-710R
and a regulator’s
LB-600.

DEVICES’ INSTALLATION

Watering controllers (other climate regulators)

The LAB-EL company provides as a set the measurement and regulation
devices: the controller LB-600 and the soil moisture sensors, air
temperature (possibly other such as: air humidity, pressure, air force
and direction etc.). The electric installation of the devices can be
performed by the groups of the local installers with adequate
qualifications or recommended by the LAB-EL company cooperating
companies.

The LAB-EL company assures warranty service (12 months) and a full
after warranty service on the territory of the whole country. The
warranty service does not cover the costs of service’s travel to
client, unless settled otherwise with a person performing the
installation.

The cost of a control system installation is introduced by the
LAB-EL company upon an individual request. The cost of an installation
“ready to be used” is introduced by a company recommended by the LAB-EL
company upon an individual request.

TRAINING COURSES

The effective work of the devices is undeniably influenced by a
user’s understanding of the details concerning the device’s work
principles and the methods of selecting the correct regulator. The
LAB-EL company organizes the training courses concerning the scope of
the offered devices for the users, distributors and system maintenance
staff.